Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c2b4e0652c49c58…

MALICIOUS

PDF

110.8 KB Created: 2021-09-07 00:44:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 9232edcc167f42a33593c56d2aae93bc SHA-1: 10f716378a601369faef3d0de65aaddeab3725b1 SHA-256: 9c2b4e0652c49c58ba0708161b2ed077c828cbae34e8be846c4a16919e6d9fbc
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URLs, many of which are hosted on compromised or disposable domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for executing malicious code or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://queure.ru/uplcv?utm_term=iap+recommended+immunization+schedule+2016+pdf PDF link annotation
    • http://findusafranchise.com/files/files/63555970619.pdfIn PDF document text
    • http://qdjshg.com/files/file/fegufuxob.pdfIn PDF document text
    • http://labradory.pl/file/48687328403.pdfIn PDF document text
    • https://wisserarm.nl/app/webroot/files/userfiles/files/30626166363.pdfIn PDF document text
    • http://dhsclassof70.com/clients/d/d1/d13f49183e6b2ef720c1f353b43de0f2/File/tosugubobugisowi.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/3c594f25cf996ff15dbc3a9fb34a1602/34102509955.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/7a744c8512f0a93ad06beb0d641b8c3b/pijadomis.pdfIn PDF document text
    • https://yukkumpulgroup2.com/contents//files/44266122091.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/ea61d42ec65bbd390eb555d7267f263a/lesitedawewexukekexukona.pdfIn PDF document text
    • http://dailymaydemtien.com/userfiles/files/xifitidojixanizexabefofo.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/40719f25a40e5a717aa54ad090d5b0b9/18016620281.pdfIn PDF document text
    • https://iaido-iaijutsu.ru/userfiles_exc/datajokemuxove.pdfIn PDF document text
    • http://vividconcept.in/userfiles/file/vakufaleladopa.pdfIn PDF document text
    • https://danielfelber.ch/userfiles/file/64837140629.pdfIn PDF document text
    • http://zhymwz.com/upfile/file/75993629196.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1611211c149126---lofezejerorimozakif.pdfIn PDF document text
    • http://tortsurprise.ru/upload/redactor/files/8875658746.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3db4b61e64---xakasube.pdfIn PDF document text
    • http://taketty.xyz/js/ckfinder/userfiles/files/33744480146.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607774ac961c4---fadubaromozep.pdfIn PDF document text
    • http://garderoba.sk/images/_file/retawitulabologojuraro.pdfIn PDF document text
    • http://baobianhkhang.com/upload/files/bedujoladebe.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013dc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DC3 11460 bytes
SHA-256: dd28df6b55abfb87b3d7e4de1a46fe37d0d1c372b1b556945d2ce3d918b7fbf2
font_01_sfnt_off000158b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158B4 23260 bytes
SHA-256: 1b98de0fe50dbcd26921eccbe706f28eac90dc737fdc99ace259dfe6d0b82f4d
font_02_sfnt_off000194d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x194D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1